How to manage EAPs in different subnets using EAP Controller (via DHCP option 138)?

In the network topology below, there are three VLANs (three subnets), which are VLAN1 (192.168.0.0/24), VLAN2 (192.168.1.0/24) and VLAN3 (172.30.30.0/24). These three VLANs (three subnets) are divided by TP-Link L3 Switch (T2600G-28TS). Now we want TP-Link EAP Controller in VLAN1 (192.168.0.0/24) to manage EAP in VLAN2 (192.168.1.0/24). The gateway Router is TP-Link SMB router TL-ER6120.

This document will introduce how to manage EAPs in different subnets using TP-Link EAP controller (via DHCP option 138). For the configurations of multi-nets NAT function on TP-LINK SMB router, please refer to:

3. Configure the static default routing entry which leads to the gateway router.

4. Enable DHCP Server function, and configure 192.168.1.0/24 IP address pool for EAPs. For Option138, you should fill in the IP address of EAP Controller Host which is “192.168.0.253”. And then the DHCP Server will tell the EAPs will the EAP Controller is, so that the EAP Controller and EAPs can communicate with each other among different subnets. Note: don’t forget to fill in the DNS server address.